Electromagnetic fuel-control valve



Jan. 3, 1928. 1,654,642

' H. G. GEISSINGER ELEcTR-OMAGNETIC FUEL CONTROL VALVE Filed Oct. 27, 1924 Patented Jan. 3, 19028.

UNITED STATES PATENT oFFlcs HARRY G. enIssI'nGER, or DETROIT, MICHIGAN.

' nLncTiioi/IAGNETIC FUEL-CONTROL 'vALvial `l Application filed October 2f?, 1924.,.Se1ia1 No. 746,170.

rThis invention relates tofan electrically vcontrolled valveand especially to a valve'r structure particularly adaptedto control the How of'fuel oil orgas'to a burner.

More specifically the invention relates to an improvement of suoli valve structures for controlling the flowV ot fuel voil oi' gas as, ior example, is shown in my priorappli-A cation tor patent iiled by me on December 21lth, 1920, and bearing the 'Serial Number 33,00% i rIhe principal objects oi the presentinvention are to provide an improved valve structure wherein the several parts are oi"4 `such i'orm and construction as to lendthemselves vto economicalproduction, to Vso Aarrange such parts that they mayberreadily' assembled; to provide a novel cut-off valve arrangement, and to provide an improved means for supportingl certain springsneed- Vful in suci'i a valve, as well as other object-sv which will be lliereina'l'ter speciiically set forth and particularly pointed out in the appended claims, reference being had to the p n 'accompanying drawings wherein,

Figure 1 isa lonitudinal median section ra ze a through a valve constructed in accordance with this iiiv-ention.

Figure 2 is a similar 'view ot a ortioii of b such valve Vshowing certain of the parts in a different position.

tions.

Figure 3 is a detail section on the line It is important that, in certain conditions of operation, leakageo'f fuel oil or gas shall be elin'iinated and while this may be done in piston valves 'of the usual construction by strictly'holding-the fits within narrow toler-r ances such a method necessarily requires very exact machining land consequently is highly expensive. The present invention provides an improved piston valve construction wherein a tight tit and no leakage is ensured without expensive machine opera-l tions and the requirement of close limita- Also the present construction is one wherein the several parts may be inade'by ordinary operations such are performed on screw machines or other types of auto-V matic lathes and the like'while, at the same time, the parts are so shaped as to enable the entire device to be quickly assembled rwithout 'the necessity of grinding parts together, making scraped fits or other expensive operations, no Apart requiring to be fitted to another-within inelimits.

Inl the present' construction it will be seen,1by vreierence .to theA drawings, that there is'provided a casing 10 wherein is an voil "chamber 11, the casing being suitably secured to the magnetic shell v12 constitut- `ing the yoke members of the actuating electro-magnet. This magnet has a core'13 provided with yenlarged pole members 1 4 cen-A trally held within the shell by means ot non-magnetic members 15, 'one end ot 4the shelll being provided with a closurel 16 of' iron orvthe like with which one 'end of the core is inicontact. v*Between` the casing Y10- and shell 12 is provided Va non-magnetic plate 17 designed to prevent sticking of the armature to the remaining end ofthe corey upon energization of the magnet. The magnet is provided with yth-e usual vwinding 13 connected through suitable cont-rollingV d'evice Anot necessary here to be shown but Ywhich may, if desired, be inthe form of aV thermostatic circuit closer, a manual switch any other ineansas iequired'by the specific use to which the valvejis to be put. y

.The casing 1 0 is divided by a transverse diaphragm-21 into twoinain parts, one of these forming thel chamber 11v^ while the other is-again divided into anV inlet chamber 22 and an outlet chamber 23 by a ldia- "phragm 24. A suitable'thre'aded opening 25 isprovided in the lower partei v the chamber 22 for. the vconnection of a supply pipe andthisichamber is connected with the chamber 11 by' an opening inthe wall or diaphragm 21' wherein is fitted vone end olf a perforated strainer t1'ibe26, the otherfeud being supported by a phlg 27 screwed into the end vlwall'of the chamber 22 Vand afford- -ing means oirren'ioving the tube ior vcleaning or repairs.

A threaded opening 28 is provided in the upper part oi' the chamber 23 for connection 4oi' a pipeleading to a'suiftable burner (not shown) and inthe diaphragm Y21 is formed opening 20 constituting the seat for a manually controlled needle 'valve 30 by means of which a slow iiow of the fluid used i for. fuel may be permitted. between the 'otwhichis bored to a larger diameter than the inner end'to provide a shoulder'for cer.

ioo

is a piston valve 3 9 having a diametricfally disposed vopening 4 0 provided v with enlarged ends which communicate with outwardly ex- .v

Vthe space between said outer end and the wall of the opening 35 and be compressed yagainst, the flange by the innerendof a valve.v bonnet 37 closing theouter end of the l'valve body and secured tothe casing 10l by bolts 3,8.. y It will be noted that the boltsnot onlyfhold the bonnet in place but also force the valve body firmly ,onto its seat. y

Slidable'in the inner end of thev valve body tending recesses4l. lithin the opening 40 .is a, helicalspring@V which bears at its ends against the shoes 43 which are held in the :enlargedzends vof the opening and serve to coveror uncoverthe ports 44 formed inthe 'valve bodyin'.v accordance with vthe outward or inward movement of the valve, these posi- .tionsbeing shown in Figuresvl and 2 respectively. VIt will be now be noted that the piston valve itself may fit in the valve body with much less accuracy than. is commonly required since the shoes will effect closure of lthe ports.A Also, these shoes automatically are kept; against the wall of the valve body 'so thatvwear of the parts does not affect the tightness of the fit and consequently leakage Itwill be isprevented. 4

noted that the valve 39, moves between the inner end ofthe valve'body and .'therports '44 so that in its open position the valve is drawninward bythe action of the' magnet on an armature 45 carried' on Vthe --inner end of a stem 46 .fixed to said valve. Consequently the fluid/must flow past the .valve from the chamber llto'reach the` ports 44 and accordingly lateral passages 47 (best .seen in Figure 3) are provided for this purpose.

- Y. In'order to move the valve outwardly and -close the ports 44 whenever the magnet is i de-energized,a forwardly extending` stem 48 is provided which passes through a centi-ally disposed opening` in a disk 49 resting on thev f shoulder between the inner and outer bores Vof the valve casing or body 34. On the outer -for forward end of this. stem is Vpinned or otherwise secured a suitable projection such` as a head 50 between which and the disl49 isarranged a Vspring 5l urging-the valve outwardly.

The pin 52 which holds this head in posii tion has one end extended to move in aslot.

5,3 formed in the valve body and thereby servesto prevent rotation of the valve `and displacement of the shoes out of proper position. A second spring `54 rests on the disk 49 at its kinner end and bears against the pin 55 at its outer end. This spring yieldmotion of the partsis restoredto the correctv Y closed position by return of the disc 4Q to its seatin the valve casing.

`lVith. this construction it will be. plain that energization of the magnet opei'isthe .valve and de-energization thereof permits the valve to close. .f

Having thus described the invention, what cluding acasing havingports for `passage of the fiuid,a piston reciprocable` to Vcover and uncover said ports, shoes carried Vby the piston to move therewith to close and open said ports, a stem projecting-.from oneend. of said piston and having a head thereon, a disk supported in said casing through which said stein passes, a spring interposed between the disk and head, and means to move the piston againstthe action of said spring.

2. A fluid controlling valve structure., includingva casing having ports .for passage of the fluid, apiston reciprocable to cover and uncover said ports, shoeslcarried by the piston to move therewith andclose and open said ports, spring mea-ns constantly pressing said shoes outwardly, a stem projecting from one end of said piston and having a `head thereon, a. disk supported in said casing through which said stein passes,ja spring interposed between the disk and head, and; 'meansto move the pistonagainst thel action of said spring. y

3. A fluid controlling valve structure, `including ajcasinghaving ports forvp'assageof the fluid, a piston kreciprocable torcover. and uncover said ports, said pistonfhaving a diainetrically disposed opening extending therethrough, shoes carried in tlieends of said opening to bear against the inner side ofsaid casing and'close and open said ports,

a spring in said opening interposed between said shoes and forcing the shoes against the inner surface of the casing, a stein projecting from one end offsaid pistonv and having a head thereon, a 'disk supported in said casing through 'which said stein passes, a spring interposed between the disk and head, andvmeans to move the piston against the action of said spring. v l i y '4. In a valve structurey a nia-in casing having an `endwall and a transverse diaphragm spaced therefrom, said wall anddiaphragm having alined' openings', a valve casing of tubular form extending through the opening in the end Wall, a flange on said valve casing substantially fitting the last mentioned opening, a packing between the inner end of the valve casing and said diaphragm, a valve bonnet fitting over the outer end of the valve casing andentering the last mentioned opening, a. second packing between the inner end of the bonnet and the said iange Within said last mentioned opening, a valve in said valve casing'and means to hold said bonnet on the main casing and thereby secure the valve casing in place.

5. A iuid controlling valve structure, comprising a casing having ports for the passage A of va fluid, a piston rcciprocable Within said land uncover said ports, a from one end of said piston having a projecting member at its outer end,' a disk bearing-on one face against an abutment or shoulder in the casingv Wall, said disk having a central opening for the passage of said stem, a spring interposed becasing to cover stem projecting tween the disc and said projecting member,

means to move the piston in one direction against the Y action of Vsaid spring, and a cushioning spring yieldingly 'holding said disk against said abutment to absorb the impact of said piston when moving in the apposite direction.

In testimony-whereof I affix my signature.

HARRY G. GnissiNGEn. 

